JPS6382624A - Dome for hydraulic transducer - Google Patents
Dome for hydraulic transducerInfo
- Publication number
- JPS6382624A JPS6382624A JP61228013A JP22801386A JPS6382624A JP S6382624 A JPS6382624 A JP S6382624A JP 61228013 A JP61228013 A JP 61228013A JP 22801386 A JP22801386 A JP 22801386A JP S6382624 A JPS6382624 A JP S6382624A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- transducer
- housing
- dome
- diaphragm
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000007788 liquid Substances 0.000 claims description 23
- 238000010168 coupling process Methods 0.000 claims description 21
- 230000008878 coupling Effects 0.000 claims description 20
- 238000005859 coupling reaction Methods 0.000 claims description 20
- -1 polyethylene Polymers 0.000 claims description 6
- 238000005192 partition Methods 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 239000002033 PVDF binder Substances 0.000 claims description 2
- 239000004698 Polyethylene Substances 0.000 claims description 2
- 239000004743 Polypropylene Substances 0.000 claims description 2
- 230000002209 hydrophobic effect Effects 0.000 claims description 2
- 229920000573 polyethylene Polymers 0.000 claims description 2
- 229920001155 polypropylene Polymers 0.000 claims description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 2
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 description 13
- 238000009530 blood pressure measurement Methods 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 230000036772 blood pressure Effects 0.000 description 4
- 239000002504 physiological saline solution Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- 206010002091 Anaesthesia Diseases 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000037005 anaesthesia Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 210000004204 blood vessel Anatomy 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000037452 priming Effects 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/021—Measuring pressure in heart or blood vessels
- A61B5/0215—Measuring pressure in heart or blood vessels by means inserted into the body
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/0007—Fluidic connecting means
- G01L19/0023—Fluidic connecting means for flowthrough systems having a flexible pressure transmitting element
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Cardiology (AREA)
- Heart & Thoracic Surgery (AREA)
- Surgery (AREA)
- Biophysics (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Veterinary Medicine (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Physiology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Vascular Medicine (AREA)
- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、例えば表面的血圧測定システムに用いられる
液体圧力トランスデューサ用ドームに関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a dome for a liquid pressure transducer used, for example, in a superficial blood pressure measurement system.
例えば外科手術での麻酔管理等のように患者の血圧を精
密にモニターする必要がある場合には、第３図に示すよ
うな表面的血圧測定システムが用いられている。For example, when it is necessary to precisely monitor a patient's blood pressure, such as during anesthesia management in a surgical operation, a superficial blood pressure measurement system as shown in FIG. 3 is used.
図示のように、このシステムでは患者の血管内に留置し
たカテーテルの他端を、圧力伝達チューブ２及び圧力ド
ーム４を介して圧力トランスデューサ５に接続する。圧
力伝達チューブ２及び圧力ドーム３の内部には例えば生
理食塩水が満たされており、この生理食塩水が圧力ドー
ム３内部に設けたダイアフラムに患者の血圧を伝達する
。ダイアフラムが受けた圧力はトランスデユーサ４に伝
達され、ここで電気信号に変換される。そして、例えば
ＣＲＴディスプレー装置５や記録装置！を１−ランスデ
ューサ４に接続することにより、患者の血圧を常時直接
的にモニターし、記録することができる。As shown, in this system, the other end of a catheter placed in a patient's blood vessel is connected to a pressure transducer 5 via a pressure transmission tube 2 and a pressure dome 4. The inside of the pressure transmission tube 2 and the pressure dome 3 are filled with, for example, physiological saline, and this physiological saline transmits the patient's blood pressure to a diaphragm provided inside the pressure dome 3. The pressure experienced by the diaphragm is transmitted to the transducer 4, where it is converted into an electrical signal. For example, a CRT display device 5 or a recording device! By connecting the 1-transducer 4 to the transducer 4, the patient's blood pressure can be directly monitored and recorded at all times.
上記表面的血圧測定システムに用いられる従来の圧力ド
ーム３は、第４図に示す断面構造を有している。ドーム
３の内部には半球状の壁面１２を有する圧力室１１が設
けられ、その底部にはダイアフラム８が液密に貼着され
ている。該ダイアフラムは生理食塩水に対する隔壁とな
り、その液圧を感知する。また、液体の入口ポート９及
び出口ポート１０が圧力室１１に導通して設けられてお
り、入口ボー１−〇は生理食塩水を圧力室１１に導入す
るために用いられる。圧力ドーム３の周縁部はスリーブ
状に下方に延設されている。この部分は圧力トランスデ
ューサ４との結合部であり、内部にトランスデユーサを
螺入するための雌ネジが切られている。トランスデユー
サ４はこの結合部に螺合され、その先端に設けた受圧板
を前記ダイアフラム８に密着させられる。図示のように
、圧力ドーム３はトランデューサとの結合部をも含めて
一体に形成されている。なお、１４．１５はチューブ２
を固定するための螺合部材である。The conventional pressure dome 3 used in the superficial blood pressure measurement system has a cross-sectional structure shown in FIG. A pressure chamber 11 having a hemispherical wall surface 12 is provided inside the dome 3, and a diaphragm 8 is fluid-tightly adhered to the bottom of the pressure chamber 11. The diaphragm acts as a barrier to saline and senses its fluid pressure. Further, a liquid inlet port 9 and an outlet port 10 are provided in communication with the pressure chamber 11, and the inlet port 1-0 is used to introduce physiological saline into the pressure chamber 11. The peripheral edge of the pressure dome 3 extends downward like a sleeve. This part is a joint part with the pressure transducer 4, and has a female thread for screwing the transducer inside. The transducer 4 is screwed into this joint, and a pressure receiving plate provided at its tip is brought into close contact with the diaphragm 8. As shown, the pressure dome 3 is integrally formed including the connection portion with the transducer. In addition, 14.15 is tube 2
This is a screwing member for fixing.
なお、第３図の血圧測定システムにおいて圧力伝達系の
内部に空気が存在していると、圧縮性を有する空気のコ
ンプライアンスが大きいため、圧力伝達が阻害されるだ
けでなくその周波数特性を変動させる等、正確な血圧測
定が行なえなくなってしまう。従って、カテーテル１を
穿刺する前に、カテーテル（圧力伝達チューブ２及び圧
力ドーム３の内部から空気を排除するためにプライミン
グ操作を行なう。これは圧力伝達チューブ２に設けた三
方コツクロから注入した生理食塩水を、カテーテル１お
よび圧力ドームの出口ポート１０から濡出させることに
よって行なう。このブライミングにより圧力伝達系の内
部を完全に生理食塩水で満たした後、第３図の状態で測
定を行なう。In addition, if air is present inside the pressure transmission system in the blood pressure measurement system shown in Figure 3, the compliance of the compressible air is large, which not only impedes pressure transmission but also changes its frequency characteristics. etc., making it impossible to measure blood pressure accurately. Therefore, before puncturing the catheter 1, a priming operation is performed to eliminate air from the inside of the catheter (pressure transmission tube 2 and pressure dome 3). This is done by wetting out water from the catheter 1 and the outlet port 10 of the pressure dome.After this brimming completely fills the inside of the pressure transmission system with physiological saline, measurements are taken in the state shown in FIG.
上記のように、表面的血圧測定システムに用いられてい
る従来の圧力ドームはトランスデユーサとの結合部が一
体に形成されているため、次のような問題があった。As described above, the conventional pressure dome used in the superficial blood pressure measurement system has the following problems because the connecting portion with the transducer is integrally formed.
第一の問題は、ダイアフラム８を圧力室１１の底面に貼
着する作業が困難なことである。即ち、ダイアフラム８
の貼着は接着剤を用い、或いは熱融着によって行なわれ
るが、その作業は当然ながらトランスデユーサ結合部の
解放端側からおこなわれる。ところが、貼着部位は前記
結合部の解放端から内側に引込んでおり、しかも前記解
放端が穫めて狭いため作業が著しく困難である。これは
貼着されたダイアフラム８の品質が一定せず、性能が低
下する原因となる。The first problem is that it is difficult to attach the diaphragm 8 to the bottom surface of the pressure chamber 11. That is, diaphragm 8
This can be done using an adhesive or by heat fusion, but this work is naturally done from the open end side of the transducer joint. However, the attachment part is retracted inward from the open end of the joint, and the open end is very narrow, making the work extremely difficult. This causes the quality of the attached diaphragm 8 to be inconsistent and the performance to deteriorate.
第二の問題は、圧力ドーム３と圧力トランスデューサ４
を螺合する際に、何れかを回転させなければならないこ
とである。トランスデユーサ４には長いコードが結合さ
れており、また圧力ドーム３にも圧力伝達チューブ２が
結合されているから、この螺合操作は極めて面倒である
。のみならず、ダイアフラム８とトランスデユーサの受
圧板とが相対的に回転しながら密着することになるため
、そのときのｆｌｊ擦でこれらが損傷し、性能が低下し
てしまうことになる。The second problem is that the pressure dome 3 and the pressure transducer 4
When screwing them together, one of them must be rotated. Since a long cord is connected to the transducer 4 and the pressure transmission tube 2 is also connected to the pressure dome 3, this screwing operation is extremely troublesome. In addition, since the diaphragm 8 and the pressure receiving plate of the transducer come into close contact with each other while rotating relative to each other, they are damaged by flj friction at that time, resulting in a decrease in performance.
第三の問題は、圧力ドーム３にトランスデユーサ４を螺
入結合する際、両者の間の空気を完全には排除できず、
ダイアフラム８とトランスデユーサ受圧板との充分な密
着が得られない問題がある。The third problem is that when the transducer 4 is screwed into the pressure dome 3, the air between them cannot be completely eliminated.
There is a problem that sufficient close contact between the diaphragm 8 and the transducer pressure plate cannot be obtained.
そこで、両者間に水を介在させて充分な圧力伝達性を与
えるために、受圧板表面に水滴を付着してトランスデユ
ーサを螺入するウェットカップリング方法が行なわれて
いる。しかし、螺入操作で回転させている間に付着した
水滴が落下してしまい、両膜間に所期の圧力結合性が得
られないことが多い。Therefore, in order to provide sufficient pressure transmittance by interposing water between the two, a wet coupling method is used in which water droplets are attached to the surface of the pressure receiving plate and the transducer is screwed into the pressure receiving plate. However, during the screw-in operation and rotation, adhering water droplets often fall, making it impossible to obtain the desired pressure bond between the two membranes.
上記事情に鑑み、本発明はダイアフラムの貼着が容易で
その品質を向上でき、またダイアフラムとトランスデユ
ーサ受圧板との圧力伝達性を向上し、且つトランスデユ
ーサの螺入操作を容易に行なえる構造を具備した液体圧
力トランスデューサ用ドームを提供しようとするもので
ある。In view of the above circumstances, the present invention makes it possible to easily attach a diaphragm and improve its quality, improve the pressure transmission between the diaphragm and the transducer pressure plate, and facilitate the screwing operation of the transducer. It is an object of the present invention to provide a dome for a liquid pressure transducer having a structure that includes the following.
本発明による液体圧力トランスデューサ用ドームは、底
面以外をハウジング内壁で限定された圧力室と、該圧力
室の底面を限定する隔壁として前記ハウジングの底部周
縁に水密に貼着されたダイアフラムと、前記圧力室に導
通して前記ハウジングに設けられた液体入口ポート及び
液体出口ポートと、前記圧力室の反対側で前記ダイアフ
ラムを圧力トランスデューサの受圧板に接続させるため
の結合部とを具備し、該結合部が略円筒形状で前記ハウ
ジングとは別体として形成され、且つ内面に前記トラン
スデユーサを螺入するための雌ネジを有すると共に、前
記ハウジングの側部周縁に嵌合されて中心軸回りに回転
自在になっていることを特徴とするものである。The dome for a liquid pressure transducer according to the present invention has a pressure chamber defined by an inner wall of the housing except for the bottom surface, a diaphragm watertightly attached to the bottom periphery of the housing as a partition wall defining the bottom surface of the pressure chamber, and a liquid inlet port and a liquid outlet port provided in the housing in communication with a chamber, and a coupling portion for connecting the diaphragm to a pressure receiving plate of a pressure transducer on an opposite side of the pressure chamber, the coupling portion has a substantially cylindrical shape and is formed separately from the housing, has a female thread on the inner surface for screwing the transducer, and is fitted to the side periphery of the housing to rotate around the central axis. It is characterized by being flexible.
本発明において、前記ダイアフラムの材質には一般にポ
リエチレン、ポリプロピレン、ポリテトラフルオロエチ
レン、ポリフッ化ビニリデン等の疎水性樹脂が用いられ
る。In the present invention, hydrophobic resins such as polyethylene, polypropylene, polytetrafluoroethylene, and polyvinylidene fluoride are generally used as the material for the diaphragm.
本発明において、夫々別体として形成された前記ハウジ
ングと前記結合部とは、所謂無理嵌合によって圧入結合
される。従って、両者のうち少なくとも結合部は弾性樹
脂で構成するのが望ましい。In the present invention, the housing and the coupling portion, which are formed separately, are press-fitted together by so-called forced fitting. Therefore, it is desirable that at least the connecting portion of both is made of elastic resin.
また、観点的血圧測定システムに用いるものではディス
ポーザブル製品とするのが一般的であるから、この場合
にはハウジング及び結合部の両者共に合成樹脂で構成す
るのがコスト的に望ましい。Moreover, since it is common to use a disposable blood pressure measurement system as a disposable product, in this case, it is desirable from the viewpoint of cost that both the housing and the connecting portion be made of synthetic resin.
本発明において、前記圧力室を限定するハウジング壁面
は半球状とするのが望ましい。In the present invention, it is desirable that the housing wall defining the pressure chamber has a hemispherical shape.
本発明による液体圧力トランスデューサ用ドームの場合
、前記結合部をハウジングに嵌合する前の状態において
、前記ダイアフラムの貼着部位が突出している。従って
、この状態でダイアフラムの貼着を行なえば、従来のよ
うに結合部が邪魔にならないから作業が極めて容易であ
る。このため、ダイアフラムの貼着状態が向上し且つ均
一化するから、ドームの圧力伝達特性が改善される。In the case of the dome for a liquid pressure transducer according to the present invention, the attachment portion of the diaphragm protrudes before the coupling portion is fitted into the housing. Therefore, if the diaphragm is attached in this state, the work will be extremely easy because the joint will not get in the way as in the conventional case. Therefore, the adhesion state of the diaphragm is improved and made uniform, and the pressure transmission characteristics of the dome are improved.
また、ハウジングの側部周縁に嵌合された結合部が自由
に回転するから、該結合部に圧力トランスデューサを螺
入する場合には結合部のみを回転するだけでよく、ハウ
ジング及びトランスデユーサは回転させる必要がない。In addition, since the coupling part fitted to the side periphery of the housing rotates freely, when screwing the pressure transducer into the coupling part, it is only necessary to rotate the coupling part, and the housing and transducer are No need to rotate.
従って、トランスデユーサのコードやドームに結合され
ている圧力チューブがよじれるといった問題は生じない
。また、トランスデユーサを螺入結合する最終段階にお
いて、ダイアフラム８とトランスデユーサの受圧板とは
相対的に回転することなく、そのまま密着する。従って
、密着時のＩＩ擦は生じず、両者の損傷が回避される。Therefore, problems such as kinking of the transducer cord or the pressure tube connected to the dome do not occur. Further, in the final step of screwing the transducer together, the diaphragm 8 and the pressure receiving plate of the transducer remain in close contact with each other without rotating relative to each other. Therefore, no rubbing occurs during close contact, and damage to both is avoided.
更に結合部とハウジングの嵌合部には隙間が存在するか
ら、トランスデユーサを螺入する際に結合部内の空気は
この隙間から外部に扱けるためウェットカップリングが
容易であり、ダイアフラムからトランスデユーサへの圧
力伝達を阻害することはない。Furthermore, since there is a gap between the coupling part and the fitting part of the housing, when the transducer is screwed in, the air inside the coupling part can be handled to the outside through this gap, making wet coupling easy. It does not impede pressure transmission to the deuser.
第１図は、本発明の一実施例になる液体圧力トランスデ
ューサ用ドームを一部切欠した状態で示す図である。同
図において、２１はハウジングである。該ハウジング内
には半球状の圧力室２４が設けられている。該圧力ｖ２
４はその底面を除いてハウジング２１の内面で限定され
ており、図示のように半球状をなしている。また、ハウ
ジング２１には圧力室に通じる液体入口ポート２２、液
体出口ポート２３が設けられている。更に、圧力室２１
の底面を限定する隔壁として、ダイアフラム２５がハウ
ジング２１の開口端面に水密に貼着されている。FIG. 1 is a partially cutaway view of a dome for a liquid pressure transducer according to an embodiment of the present invention. In the figure, 21 is a housing. A hemispherical pressure chamber 24 is provided within the housing. The pressure v2
4 is defined by the inner surface of the housing 21 except for its bottom surface, and has a hemispherical shape as shown. Further, the housing 21 is provided with a liquid inlet port 22 and a liquid outlet port 23 communicating with the pressure chamber. Furthermore, the pressure chamber 21
A diaphragm 25 is watertightly attached to the open end surface of the housing 21 as a partition wall that defines the bottom surface of the housing 21 .
２６はトランスデユーサとの結合部で、略円筒形をなし
、内面にはトランスデユーサを螺入するための雌ネジが
切られている。また、結合部２６の上端には内側に向け
て係合凸線２４が設けられている。そして、この保合凸
警工はハウジング２１の側部周囲に形成した嵌合溝３４
内に嵌合されている。これにより、結合部２６はハウジ
ング２１の下部に係止され、中心軸方向には移動できな
いが軸回りに自由に回転できるようになっている。Reference numeral 26 denotes a connecting portion with the transducer, which has a substantially cylindrical shape, and has a female thread cut into the inner surface for screwing the transducer into it. Furthermore, an engaging convex line 24 is provided at the upper end of the coupling portion 26 toward the inside. This fitting protrusion is formed in a fitting groove 34 formed around the side of the housing 21.
fitted inside. Thereby, the coupling part 26 is locked to the lower part of the housing 21, and although it cannot move in the direction of the central axis, it can freely rotate around the axis.
なお、液体入口ポート２２および液体出口ポート２３の
夫々には、第３図の圧力伝達チューブ２を固定するため
の螺合部材２７．２８が設けられている。Incidentally, each of the liquid inlet port 22 and the liquid outlet port 23 is provided with screw members 27 and 28 for fixing the pressure transmission tube 2 shown in FIG. 3.
上記実施例における結合部２６はハウジング１１とは別
個に形成され、所謂無理嵌合によりハウジングに結合さ
れる。また、この無理嵌合に先立って、ダイアフラム２
５がハウジング２１の圧力室開口端面に貼着される。即
ち、ダイアフラム２５の貼着作業は結合部２６が存在し
ない状態で行なわれるから作業が容易となり、しかも種
々の治具を使用して行なうことができる。従って、膜の
貼着状態を改善し且つ均一化でき、圧力伝達特性の向上
を図ることができる。The coupling portion 26 in the above embodiment is formed separately from the housing 11 and is coupled to the housing by so-called forced fitting. Also, prior to this forced fitting, the diaphragm 2
5 is attached to the pressure chamber opening end surface of the housing 21. That is, since the work of attaching the diaphragm 25 is carried out in the absence of the joint portion 26, the work is easy and can be carried out using various jigs. Therefore, the adhesion state of the membrane can be improved and made uniform, and the pressure transmission characteristics can be improved.
第２図は、上記実施例のドームに圧力トランスデューサ
３１を結合する方法を示す説明図である。FIG. 2 is an explanatory diagram showing a method of coupling the pressure transducer 31 to the dome of the above embodiment.
まず、同図（Ａ）に示すように両者を所定の結合位置に
ａｉｌ！置する。トランスデユーサ３１の周面には、図
示のように螺合のための雄ネジが切られている。また、
トランスデユーサの受圧板３２表面には、図示のように
水滴３３を付着させておく。First, as shown in the same figure (A), ail! place As shown in the figure, the transducer 31 has a male thread cut on its circumferential surface for screwing. Also,
Water droplets 33 are attached to the surface of the pressure receiving plate 32 of the transducer as shown in the figure.
この状態で、トランスデユーサ３１を図中矢印で示すよ
うにドームの結合部２６内に螺入する。その際、ドーム
のハウジンング２１及びトランスデユーサ３１は回転さ
せることなく、結合部２６を螺合方向に回転させるだけ
でよい。従って、１〜ランスデユーサ３１のコードがよ
じれるようなことはなく、螺合操作が著しく容易となる
。また、受圧板３２の表面に付着させた水滴３３につい
ても、トランスデユーサ３１を固定した状態で螺入でき
るから、途中で落下するのを防止できる。In this state, the transducer 31 is screwed into the coupling portion 26 of the dome as shown by the arrow in the figure. At this time, the dome housing 21 and the transducer 31 need not be rotated, but only the coupling portion 26 needs to be rotated in the screwing direction. Therefore, the cords from 1 to 31 are not twisted, and the screwing operation becomes extremely easy. Further, since the water droplets 33 attached to the surface of the pressure receiving plate 32 can be screwed in with the transducer 31 fixed, it is possible to prevent them from falling on the way.
上記のように結合部２６を回転し、トランスデユーサ３
１を螺入することにより、第２図（Ｂ）に示すように、
トランスデユーサの受圧板３２がドームのダイアフラム
２５に密着し、両者の間に圧力伝達性の結合が達成され
る。その場合、結合部２６の内部に存在していた空気は
、図中矢印で″示すようにハウジング２４との嵌合部に
存在する隙間を通って外部に抜ける。また、受圧板表面
に付着しておいた水滴３３が両者の間に充満し、これに
よって優れたａｌ性が得られるため、ダイアフラム２５
から受圧板３２への圧力伝達効率は著しく向上する。Rotate the coupling portion 26 as described above, and the transducer 3
By screwing in 1, as shown in Fig. 2 (B),
The pressure plate 32 of the transducer fits closely against the diaphragm 25 of the dome and a pressure transmitting connection is achieved between the two. In that case, the air that existed inside the coupling part 26 escapes to the outside through the gap that exists in the fitting part with the housing 24, as shown by the arrow in the figure. The water droplets 33 that have been placed on the diaphragm 25 fill up between the two, thereby providing excellent aluminum properties.
The efficiency of pressure transmission from the pressure receiving plate 32 to the pressure receiving plate 32 is significantly improved.
（発明の効果）
以上詳述したように、本発明による液体圧力トランスデ
ューサ用ドームはダイアフラムの貼着が容易でその品質
を向上でき、またダイアフラムとトランスデユーサ受圧
板との圧力伝達性を向上し、且つトランスデユーサの螺
入操作を容易に行なうことができる等、顕著な効果を奏
するものである。(Effects of the Invention) As detailed above, in the dome for a liquid pressure transducer according to the present invention, the diaphragm can be easily attached and its quality can be improved, and the pressure transmittance between the diaphragm and the transducer pressure plate can be improved. , and the transducer can be easily screwed in, which brings about remarkable effects.
第１図は本発明の一実施例になる液体圧力トランスデュ
ーサ用ドームを一部断面で示す正面図であり、第２図は
これに圧力トランスデューサを結合する操作を示す説明
図、第３図は圧力トランスデューサを用いた観点的血圧
測定システムの説明図であり、第４図はこのシステムに
用いられている従来の圧力トランスデューサ用ドームの
構造を示す断面図である。
２１・・・ハウジング、２２・・・液体入口ポート、２
３・・・液体出口ポート、２４・・・圧力室、２５・・
・ダイアフラム、２６・・・結合部、２７．２８・・・
螺合部材。
出願人代理人 弁理士 鈴江武彦
第１図
第２図FIG. 1 is a partially sectional front view of a dome for a liquid pressure transducer according to an embodiment of the present invention, FIG. 2 is an explanatory view showing the operation of connecting a pressure transducer to the dome, and FIG. FIG. 4 is an explanatory diagram of a perspective blood pressure measurement system using a transducer, and FIG. 4 is a sectional view showing the structure of a conventional pressure transducer dome used in this system. 21...Housing, 22...Liquid inlet port, 2
3...Liquid outlet port, 24...Pressure chamber, 25...
・Diaphragm, 26...Joining part, 27.28...
Screwing member. Applicant's agent Patent attorney Takehiko Suzue Figure 1 Figure 2
Claims (4)
、該圧力室の底面を限定する隔壁として前記ハウジング
の底部周縁に液密に貼着されたダイアフラムと、前記圧
力室に導通して前記ハウジングに設けられた液体入口ポ
ート及び液体出口ポートと、前記圧力室の反対側で前記
ダイアフラムを圧力トランスデューサの受圧板に接触さ
せるための結合体とを具備し、該結合体は略円筒形状で
前記ハウジングとは別体として形成され、且つ内面に前
記トランスデューサを螺入するための雌ネジを有すると
共に、前記ハウジングの側部周縁に嵌合されて中心軸回
りに独立して回転自在になっていることを特徴とする液
体圧力トランスデューサ用ドーム。(1) A pressure chamber whose portion other than the bottom surface is constituted by the inner wall of the housing, a diaphragm fluid-tightly attached to the bottom periphery of the housing as a partition wall defining the bottom surface of the pressure chamber, and a diaphragm that is electrically connected to the pressure chamber and a liquid inlet port and a liquid outlet port provided in the housing; and a coupling body for bringing the diaphragm into contact with a pressure receiving plate of a pressure transducer on the opposite side of the pressure chamber, the coupling body having a generally cylindrical shape and having a liquid outlet port provided in the housing. It is formed separately from the housing, has a female thread on its inner surface for screwing the transducer, and is fitted to the side periphery of the housing so that it can rotate independently around the central axis. A dome for a liquid pressure transducer characterized by:
る特許請求の範囲第（１）項記載の液体圧力トランスデ
ューサ用ドーム。(2) The dome for a liquid pressure transducer according to claim (1), wherein the pressure chamber has a hemispherical shape.
ことを特徴とする特許請求の範囲第（１）項または第（
２）項記載の液体圧力トランスデューサ用ドーム。(3) At least the connecting portion is formed of an elastic body.
Dome for liquid pressure transducer as described in 2).
ン、ポリテトラフルオロエチレン、ポリフッ化ビニリデ
ン等の疎水性樹脂からなることを特徴とする特許請求の
範囲第（１）項、第（２）項または第（３）項記載の液
体圧力トランスデューサ用ドーム。(4) Claims (1), (2), or (3), wherein the diaphragm is made of a hydrophobic resin such as polyethylene, polypropylene, polytetrafluoroethylene, or polyvinylidene fluoride. Dome for liquid pressure transducer as described in section.
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61228013A JPS6382624A (en) | 1986-09-29 | 1986-09-29 | Dome for hydraulic transducer |
| AU80289/87A AU600041B2 (en) | 1986-09-29 | 1987-09-25 | Dome for liquid pressure transducers |
| EP87906212A EP0326616A1 (en) | 1986-09-29 | 1987-09-25 | Dome for liquid pressure transducers |
| PCT/JP1987/000699 WO1988002235A1 (en) | 1986-09-29 | 1987-09-25 | Dome for liquid pressure transducers |
| KR1019880700593A KR900004139B1 (en) | 1986-09-29 | 1987-09-25 | Dome for liquid pressure transducers |
| ES878702772A ES2005353A6 (en) | 1986-09-29 | 1987-09-29 | Dome for liquid pressure transducers. |
| DK291388A DK291388A (en) | 1986-09-29 | 1988-05-27 | PRESSURE DEVICE FOR LIQUID PRESSURE TRUCKS, NECESSARY FOR USE IN MONITORING SIMILAR BLOOD PRESSURE MEASUREMENT SYSTEMS |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61228013A JPS6382624A (en) | 1986-09-29 | 1986-09-29 | Dome for hydraulic transducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6382624A true JPS6382624A (en) | 1988-04-13 |
Family
ID=16869813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61228013A Pending JPS6382624A (en) | 1986-09-29 | 1986-09-29 | Dome for hydraulic transducer |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP0326616A1 (en) |
| JP (1) | JPS6382624A (en) |
| KR (1) | KR900004139B1 (en) |
| AU (1) | AU600041B2 (en) |
| DK (1) | DK291388A (en) |
| ES (1) | ES2005353A6 (en) |
| WO (1) | WO1988002235A1 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6088535A (en) * | 1983-09-16 | 1985-05-18 | アメリカン ホスピタル サプライ コーポレーシヨン | Dome attached to pressure converter and assembly |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1087783A (en) * | 1952-02-05 | 1955-02-28 | Alltools Ltd | New or improved hydrostatic connection |
| US4072056A (en) * | 1976-06-28 | 1978-02-07 | Varian Associates, Inc. | Fluid containment structure for transducer system |
| US4252126A (en) * | 1979-07-27 | 1981-02-24 | Medex Inc. | Transducer dome |
| JPS62277938A (en) * | 1986-05-26 | 1987-12-02 | テルモ株式会社 | Dome for hydraulic transducer |
| JPH0688535A (en) * | 1992-09-07 | 1994-03-29 | Nissan Motor Co Ltd | Accessories driving device of automobile |
-
1986
- 1986-09-29 JP JP61228013A patent/JPS6382624A/en active Pending
-
1987
- 1987-09-25 EP EP87906212A patent/EP0326616A1/en not_active Withdrawn
- 1987-09-25 WO PCT/JP1987/000699 patent/WO1988002235A1/en not_active Application Discontinuation
- 1987-09-25 AU AU80289/87A patent/AU600041B2/en not_active Ceased
- 1987-09-25 KR KR1019880700593A patent/KR900004139B1/en not_active IP Right Cessation
- 1987-09-29 ES ES878702772A patent/ES2005353A6/en not_active Expired
-
1988
- 1988-05-27 DK DK291388A patent/DK291388A/en not_active Application Discontinuation
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6088535A (en) * | 1983-09-16 | 1985-05-18 | アメリカン ホスピタル サプライ コーポレーシヨン | Dome attached to pressure converter and assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| AU600041B2 (en) | 1990-08-02 |
| KR900004139B1 (en) | 1990-06-16 |
| AU8028987A (en) | 1988-04-21 |
| KR880701531A (en) | 1988-11-03 |
| WO1988002235A1 (en) | 1988-04-07 |
| ES2005353A6 (en) | 1989-03-01 |
| DK291388D0 (en) | 1988-05-27 |
| EP0326616A4 (en) | 1989-06-14 |
| DK291388A (en) | 1988-07-22 |
| EP0326616A1 (en) | 1989-08-09 |
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